Separation modes in microcontacts identified by the rate dependence of the pull-off force
Separation modes in microcontacts identified by the rate dependence of the pull-off force
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DOI：
10.1063/1.2967855
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发表时间：
2008-08-04
影响因子：
4
通讯作者：
Du, Y.
中科院分区：
文献类型：
--
作者：
Chen, L.;McGruer, N. E.;Du, Y.
我们报告在接触循环试验期间观察到的两种不同模式的速率依赖行为。一个是在低循环率下更高的拉离力，另一个是在高循环率下更高的拉离力。随后使用扫描电子显微镜（SEM）对这些接触进行的研究表明，这两种速率相关的模式可能与脆性和韧性分离模式有关。前者表现为脆性分离，后者表现为韧性分离。因此，通过监测拉离力的速率依赖性，可以在循环过程中识别分离模式的类型，而无需中断测试以执行SEM。(C) 2008年美国物理研究所。
We report the observation of two distinct modes of rate-dependent behavior during contact cycling tests. One is a higher pull-off force at low cycling rates and the other is a higher pull-off force at high cycling rates. Subsequent investigation of these contacts using scanning electron microscopy (SEM) demonstrates that these two rate-dependent modes can be related to brittle and ductile separation modes. The former behavior is indicative of brittle separation, whereas the latter accompanies ductile separation. Thus by monitoring the rate dependence of the pull-off force, the type of separation mode can be identified during cycling without interrupting the test to perform SEM. (C) 2008 American Institute of Physics.